Final Phase II report : QuickSite(R) investigation, Everest, Kansas. Page: 20 of 402
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Everest, Kansas, QuickSite Investigation Phase II Report
Version 00, 05/09/03 2-1
2 Investigative Methods
The Everest Phase II investigation was performed by using an iterative process of data
collection, evaluation, and interpretation during the field program, to ensure that all data
necessary to achieve the specific technical objectives defined for the site were obtained.
Fundamental to this approach is the use of multiple complementary investigative techniques to
acquire data relevant to each of the specific technical objectives, so that the interpretations being
developed can be tested independently against multiple lines of evidence. Individual data sets
acquired by a particular technique can also be interpreted in multiple ways to yield information
addressing more than one specific technical objective. Throughout the field program, a
comprehensive quality assurance/quality control (QA/QC) program is implemented to confirm
the reliability of all information as it is accumulated. With this procedure, an integrated,
technically defensible model of the hydrogeologic environment and the distribution and
migration of carbon tetrachloride within this setting is assembled as the specific technical
objectives are addressed.
The primary goals of the Phase II studies at Everest and the program of activities outlined
to achieve these goals were discussed in Section 6.2 of the Phase I report (Argonne 2001).
Specific technical objectives developed to guide the progress of the Phase II field activities are
presented in Section 1 of the present report. Procedures for the individual techniques employed
by Argonne at this site are in the Master Work Plan (Argonne 2002). This section presents a
brief summary of the methods used to implement Phase II at Everest, and it identifies certain
modifications made to the field program (relative to recommendations in the Phase I report
[Argonne 2001]) in response to the new information obtained during the course of the study.
2.1 Method to Confirm an Association of Carbon Tetrachloride Contamination
with the Former Everest CCC/USDA Facility
Previous Argonne investigations have demonstrated that analysis of vegetation and near-
surface (vadose zone) soils for carbon tetrachloride by the headspace method (a modification of
U.S. Environmental Protection Agency [EPA] Method 5021) is a sensitive and positive indicator
of potential deeper vadose zone soil contamination. In this application, the headspace data are
not used quantitatively but are examined for distribution patterns in order to prioritize areas for
additional, follow-up subsurface soil sampling and analysis. In conjunction with the headspace
analyses, the near-surface soils are also examined by using purge-and-trap sample preparation
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LaFreniere, L. M. Final Phase II report : QuickSite(R) investigation, Everest, Kansas., report, November 1, 2003; United States. (https://digital.library.unt.edu/ark:/67531/metadc836217/m1/20/?q=%22Public+Health%22: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.